From aca46c49c87202b3dea65041e5aef99a653e7a3d Mon Sep 17 00:00:00 2001
From: Christopher Lackner <clackner@cerbsim.com>
Date: Wed, 1 Sep 2021 14:34:30 +0200
Subject: [PATCH 1/2] add SetDomainLayer for geom2d

---
 libsrc/geom2d/geometry2d.hpp    | 12 +++++++++++-
 libsrc/geom2d/python_geom2d.cpp |  1 +
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/libsrc/geom2d/geometry2d.hpp b/libsrc/geom2d/geometry2d.hpp
index daab8d12..08c3fc9d 100644
--- a/libsrc/geom2d/geometry2d.hpp
+++ b/libsrc/geom2d/geometry2d.hpp
@@ -250,7 +250,17 @@ namespace netgen
       if ( layer.Size() ) return layer[domnr-1]; 
       else return 1;
     }
-
+    void SetDomainLayer (int domnr, int layernr)
+    {
+      auto old_size = layer.Size();
+      if(domnr > old_size)
+        {
+          layer.SetSize(domnr);
+          for(size_t i = old_size; i < domnr; i++)
+            layer[i] = 1;
+        }
+      layer[domnr-1] = layernr;
+    }
 
     string GetBCName (int bcnr) const;
     void SetBCName (int bcnr, string name);
diff --git a/libsrc/geom2d/python_geom2d.cpp b/libsrc/geom2d/python_geom2d.cpp
index 2b01e566..83e44f6c 100644
--- a/libsrc/geom2d/python_geom2d.cpp
+++ b/libsrc/geom2d/python_geom2d.cpp
@@ -49,6 +49,7 @@ NGCORE_API_EXPORT void ExportGeom2d(py::module &m)
                   }))
     .def(NGSPickle<SplineGeometry2d>())
     .def("Load",&SplineGeometry2d::Load)
+    .def("SetDomainLayer", &SplineGeometry2d::SetDomainLayer)
     .def("AppendPoint", FunctionPointer
          ([](SplineGeometry2d &self, double px, double py, double maxh, double hpref, string name)
           {

From f53dad83aec59c9893b40b5bad3ef423478380dd Mon Sep 17 00:00:00 2001
From: Matthias Hochsteger <mhochsteger@cerbsim.com>
Date: Wed, 1 Sep 2021 14:38:45 +0200
Subject: [PATCH 2/2] layer property for Solid2d

---
 libsrc/geom2d/csg2d.cpp         | 4 ++++
 libsrc/geom2d/csg2d.hpp         | 7 +++++++
 libsrc/geom2d/python_geom2d.cpp | 1 +
 3 files changed, 12 insertions(+)

diff --git a/libsrc/geom2d/csg2d.cpp b/libsrc/geom2d/csg2d.cpp
index dd8cf21a..dfee7fba 100644
--- a/libsrc/geom2d/csg2d.cpp
+++ b/libsrc/geom2d/csg2d.cpp
@@ -2183,7 +2183,11 @@ shared_ptr<netgen::SplineGeometry2d> CSG2d :: GenerateSplineGeometry()
       }
     }
     if(!is_solid_degenerated)
+    {
       geo->SetMaterial(dom, s.name);
+      if(s.layer != 1)
+          geo->SetDomainLayer(dom, s.layer);
+    }
     else
       dom--; // degenerated solid, use same domain index again
   }
diff --git a/libsrc/geom2d/csg2d.hpp b/libsrc/geom2d/csg2d.hpp
index afc1e654..fbe705a9 100644
--- a/libsrc/geom2d/csg2d.hpp
+++ b/libsrc/geom2d/csg2d.hpp
@@ -630,6 +630,7 @@ struct Solid2d
 {
   Array<Loop> polys;
 
+  int layer = 1;
   string name = MAT_DEFAULT;
 
   Solid2d() = default;
@@ -708,6 +709,12 @@ struct Solid2d
     return *this;
   }
 
+  Solid2d & Layer(int layer_)
+  {
+    layer = layer_;
+    return *this;
+  }
+
   Box<2> GetBoundingBox() const;
 };
 
diff --git a/libsrc/geom2d/python_geom2d.cpp b/libsrc/geom2d/python_geom2d.cpp
index 83e44f6c..dc14bd67 100644
--- a/libsrc/geom2d/python_geom2d.cpp
+++ b/libsrc/geom2d/python_geom2d.cpp
@@ -433,6 +433,7 @@ NGCORE_API_EXPORT void ExportGeom2d(py::module &m)
     .def("Mat", &Solid2d::Mat)
     .def("BC", &Solid2d::BC)
     .def("Maxh", &Solid2d::Maxh)
+    .def("Layer", &Solid2d::Layer)
 
     .def("Copy", [](Solid2d & self) -> Solid2d { return self; })
     .def("Move", &Solid2d::Move)